Fluid pump



S. J. MIKINA Dec. l5, 1942.

FLUID PUMP Filed Nov. s, 1939 v un Haul INVENTOR STANLEY J. M/KINA- WITNESSES:

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ATTO'RN Patented Dec; 15, 1942 FLUID PUMP l Stanley J. Mikina, Wilkinshurg, Pa., assignor to Westinghouse Electric & Manufacturing Company, East Pittsburgh, Pa., a corporation of Pennsylvania Application November 3, 1939, Serial No. 302,711

9 Claims. (Cl. 230--206) This invention relates to mechanical translating devices and more particularly to means for effecting a linear movement from an angularly oscillating movement.

One object of the invention is to provide a means for utilizing the force exerted by an an gularly oscillating member.

A further object is to provide a new and improved fluid-translating apparatus.

A still further object is to provide an improved means for circulating the lubricating or cooling liquid in reciprocating machinery.

These and other objects are effected by my invention as will be apparent from the following description and claims taken in connection with the accompanying drawing, forming a part of this application, in which:

Fig. 1 is a partial vertical section through a refrigerant condensing apparatus embodying the mechanical movement of this invention; and,

Fig. 2 is a section on line V--V of Fig. 1.

Referring to the drawing for a detailed description of my invention, the reference numeral 49 represents a cup-shaped container having an enlarged section 5I adjacent the lip portion thereof. A cover 52 is welded to the lips of the container 49 to provide a sealed casing 53. A motor 54 is pressed into the smaller section 55 of the container 49, which motor 54 comprises a housing 56, a stator 51 secured in the housing 56, an overhanging shaft 58 journaled in the housing 56, a rotor 59 secured on one end of the shaft 58, and a crank arm 6l secured on the other end of the shaft 58. 'I'he stator 51 of the motor 54 receives electrical energy through bushin gs (not shown) sealed in the walls of the casing 53 and drives the rotor 59.

A reciprocating compressor 63 is secured to the face of the housing 56 and comprises a cylinder 64, a piston 65 therein, a connecting rod 66 for actuating the piston 65 journaled to a crankpln 62 on the crank arm 6 I, and a valve chamber 61.`

The compressor 63 receives refrigerant vapor from the interior of the casing 53 through a tube 68, compresses the vapor, and forces it through a tube 69 to a refrigerant vapor condenser 1l of conventional design. The refrigerant vapor en ters the casing through a tube 12. The con.t

denser 1l and the casing 53 are cooled by a fan 13, driven by a motor 14, which draws air through the condenser 1l and blows it over the casing 53. As thus far described, the apparatus is well known in the art.

The casing 53 contains a supply of lubricating and cooling oil in the lower portion or oil sump 15, which oil is circulated by the pump 16 of this invention.

The pump 16 comprises an upright tube 11 pivoted at its lower end on a pin 18 journaled in a boss 19 secured to't-he motor housing 56 by bolts 8l. The axis of the pin 18 is parallel to the axes of the shaft 58 and crankpin 62. The tube 11 extends upwardly towards the upper p0rtion of the casing 53 and is oscillated back and forth by the crankpin 62.

To effect this oscillating motion, a cross-head 82 engages the tube 11 at about its center, which cross-head 82 is adapted to slide on the tube 11. The cross-head 82 also engages with a small projecting pin 83 on, and co-axial with, the crankpin 62. The tube 11 dips into the oil in the oil sump 15 and the force developed by the angular oscillation of the tube 11 on the pin 18 moves the oil upwardly in the tube 11.

Most of the oil emerging from the upper end of the tube 11 is thrown sidewardly and slightly upwardly. A portion of this stream of oil is intercepted by deflectors 84 welded to the casing 53 which spray it over the compressor 63 to lubricate and cool the same. A portion of the sprayed oil flows down the oil duct 85 in the housing 56 and lubricates the bearing of the shaft 58. Other portions of the sprayed oil run down the outer sides of the cylinder 64 and lubricate the various journals of the driving mechanism. A small amount of oil is also entrained by the refrigerant vapor which enters the inlet tube 68 and lubricates the piston 65.

The portion of the oil thrown from the tube 11 which is not intercepted by the deilectors 84 strikes the walls of the casing and flows downwardly on, and is cooled by, these walls. Both the heated oil from the compressor 63 and the cooled oil from the walls of the casing 53 return by gravity to the oil sump 15 to be recirculated by the pump 16.

The pump is self-priming and requires only a small portion of its length to be submerged in the oil. It has been found, for example, that a pump comprising a tube seven inches in length and one-quarter inch internal diameter when immersed for a quarter of an inch in the oil and/ oscillated through an arc of 20 at a rate of 1725 cycles per minute will establish its full flow in two seconds.

It will be apparent from the above that this invention provides a valveless fluid pump having an angularly reciprocating motion and that this pump is adapted for circulating lubricating oil in a sealed motor-compressor.

While I have shown my invention in several forms, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various other changes and modifications without departing from the spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are specifically set forth in the appended claims.

What I claim is:

1. In a fluid translating device, the combination of a compressor, means for driving said compressor, a casing enclosing said compressor, said casing having a lubricant sump, a quantity of lubricant in said sump, means for cooling said casing, a tubular member in said casing, means for pivoting said tubular member with one end thereof projecting into said sump, and means for oscillating said tubular member on said pivot to force oil through the tubular member from the sump.

2. In a fluid translating device, the combination of a compressor, means for driving said comy pressor, a casing enclosing said compressor, said casing having a lubricant sump, a quantity of lubricant in said sump, means for cooling said casing, a tubular member in said casing, means for pivoting said tubular member adjacent one end thereof, said end communicating with the lubricant, and means actuated by said driving means for oscillating said tubular member about said pivot, the oscillating end of said tubular member providing an outlet for said lubricant.

3. In a fluid translating device, the combination of a compressor, means for driving said compressor, a casing enclosing said compressor, said casing having a lubricant sump, a quantity of lubricant in said sump, a tubular member in said casing, means for pivoting said tubular member with one end thereof projecting into said sump, and means for oscillating said tubular member on said pivot to force oil through the tubular member from the sump.

4. In a mechanical translating device, the combination of a reciprocating compressor, a crank arm and a crankpin for actuating said compressor, a casing enclosing said compressor, crank arm, and crankpin, means for cooling said casing, a lubricant sump therein, a substantially upright tube pivoted adjacent its lower end to communicate with said lubricant sump, a cross-head adapted to slide on said tube and engage said crankpin to oscillate said tube on said pivot to draw lubricant from said oil sump, and a deflector on said casing to deflect a portion of the 1ubricant issuing from said tube on said compressor to cool and lubricate the same, said tube spraying another portion of the lubricant issuing therefrom against the Wall of said casing to cool said lubricant.

5. In a liquid pump, the combination of a pipe member, means for oscillating said member on an axis adjacent one .end thereof and remote from the other end of said member, means for admitting a fluid to said end adjacent the axis, a chamber communicating directly with the end of said member remote from said axis, said chamber not oscillating with said member, said oscillating means oscillating said member at a frequency to cause said liquid to travel therethrough from the end adjacent said axis to the end remote therefrom by centrifugal force.

6. In a liquid pump, the combination of a chamber, a pipe member in said chamber and adapted for oscillation therein on an axis adjacent one end of said member and remote from the other end thereof, means for admiting a fluid to the end of said member adjacent said axis, and means for oscillating said pipe member on said axis with respect to said chamberat a frequency to cause a liquid admitted to the member by said admitting means to travel and issue by centrifugal force from the end of the member remote from said axis, said last-named end communicating directly with the interior of said chamber.

7. In, a mechanical translating device, the combination of a mechanism to be lubricated, a sump for collecting oil, an open-ended tube projecting into said sump and pivoted in close proximity thereto, means actuated by said mechanism for oscillating said tube on said pivot to force oil therethrough by centrifugal force, and means for directing the oil passing through said tube to said mechanism.

8. In a mechanical translating device, the combination of a hollow member adapted for angular oscillation, means for supplying a fluid to.

said hollow member at a point of relatively low linear velocity, said member having means for emitting said fluid at a point of relatively higher linear velocity, and means for oscillating said member at a speed to cause fluid therein to move from said point of relatively low linear velocity to said emitting means by centrifugal force.

9. In a mechanical translating device, the combination of an elongated, hollow member pivoted adjacent one of its ends, means for oscillating said member on said pivot, and means for supplying a fluid to said hollow member at a point of relatively low linear velocity, said member having means for emitting'said fluid at a point of relatively higher linear velocity, said oscillating means being adapted to oscillate said member at a speed to cause fiuidin said member to move from said point of relatively low linear velocity to said emitting means by centrifugal force.

STANLEY J. MIKINA. 

